Method syncComplete

packages/workbox-background-sync/src/Queue.ts:429–459

()

          }

          const syncComplete = async () => {
            this._syncInProgress = true;

            let syncError;
            try {
              await this._onSync({queue: this});
            } catch (error) {
              if (error instanceof Error) {
                syncError = error;

                // Rethrow the error. Note: the logic in the finally clause
                // will run before this gets rethrown.
                throw syncError;
              }
            } finally {
              // New items may have been added to the queue during the sync,
              // so we need to register for a new sync if that's happened...
              // Unless there was an error during the sync, in which
              // case the browser will automatically retry later, as long
              // as `event.lastChance` is not true.
              if (
                this._requestsAddedDuringSync &&
                !(syncError && !event.lastChance)
              ) {
                await this.registerSync();
              }

              this._syncInProgress = false;
              this._requestsAddedDuringSync = false;
            }
          };
          event.waitUntil(syncComplete());
        }
      });